Sigil crashing

[jwes]

If I have Sigil open, but don't use it for a few hours, I regularly get a message 'Sigil has encountered a problem. Sigil may need to close.
Error info: Critical: ARB::createContext: wglCreateContextAttribsARB() failed (GL error code: 0x502) for format: QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat:efaultSwapBehavior, swapInterval 1, colorSpace QSurfaceFormat:efaultColorSpace, profile QSurfaceFormat::NoProfile), shared context: 0x30000 (The operation completed successfully.)
Sigil version: 1.9.30
Runtime Qt: 5.12.9
Compiled Qt: 5.12.9
System: Windows 10 (10.0)
Architecture: x86_64

and another error box:
Error info: Critical: GDI::createContext: wglCreateContext failed. (Unknown error 0xc007001f.)
Sigil version: 1.9.30
Runtime Qt: 5.12.9
Compiled Qt: 5.12.9
System: Windows 10 (10.0)
Architecture: x86_64

and a third box:
Error info: Fatal: Failed to create OpenGL context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat:efaultSwapBehavior, swapInterval 1, colorSpace QSurfaceFormat:efaultColorSpace, profile QSurfaceFormat::NoProfile) .
This is most likely caused by not having the necessary graphics drivers installed.

Install a driver providing OpenGL 2.0 or higher, or, if this is not possible, make sure the ANGLE Open GL ES 2.0 emulation libraries (libEGL.dll, libGLESv2.dll and d3dcompiler_*.dll) are available in the application executable's directory or in a location listed in PATH.
Sigil version: 1.9.30
Runtime Qt: 5.12.9
Compiled Qt: 5.12.9
System: Windows 10 (10.0)
Architecture: x86_64

If I am using Sigil, I have no such problems. I am accessing the machine through Remote desktop, so there is no user activity whatever for a few hours. AFAIK my system and drivers are up to date.

[DiapDealer]

The internet is full of "Failed to create OpenGL context for format" errors with programs run via Remote Desktop.

Here are just a couple:

https://learn.microsoft.com/en-us/an...-reconnect-you
https://github.com/plexinc/plex-media-player/issues/742
https://community.rstudio.com/t/rstu...-failing/77559
https://stackoverflow.com/questions/...windows-remote

[KevinH]

Meaning that the bug is not in Sigil but in how OpenGL interacts with Remote Desktop. So we cannot unfortunately do anything about it.

In fact it is a well-known and longstanding problem:

See for example: https://stackoverflow.com/questions/...windows-remote

That said, does turning off Graphics Acceleration in Sigil Preferences help at all?

[jwes]

This seems to have fixed it

Browse to: Local Computer Policy\Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Remote Session Environment
Find the item “Use WDDM graphics display driver for Remote Desktop Connections” and disable it.

[KevinH]

Thanks for reporting that back. Hopefully it will help others who find this thread who have similar issues.

[Turtle91]

Originally Posted by jwes

This seems to have fixed it

Browse to: Local Computer Policy\Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Remote Session Environment
Find the item “Use WDDM graphics display driver for Remote Desktop Connections” and disable it.

Did you try that before, or after, setting the GPU acceleration in Sigil preferences?